Single superparticle production via γγ collision with explicit R-parity violation

We study the single production of scalar neutrinos or charginos via γγ collision in an R-parity (Rp) violating supersymmetric model. It may be possible to detect a sneutrino or a chargino at a Linear Collider (LC) in γγ operation mode, as a test of supersymmetry and Rp-violation. Because of the clean background in LC, stringent constraints on Rp violating parameters can be obtained even if the process cannot be observed at the future Linear Collider.